Man of Honour
Again I'm not making any claims re: law. There are some accounts from different sources mentioning it as a custom so it is a bit dubious to state it definitely didn't happen.
It's always described as a right, which is a claim about law. The right of the lord, the right of the first night...always described as a right.
There are some accounts from different sources mentioning it being a custom for Jewish people to kill babies to make bread for religious rituals. There are some accounts from different sources later in time of chastity belts being used in England in medieval times. There are quite a few examples of accounts from different sources about customs of other people and/or other times. These other people are savages, this other time was savage, the common theme being "not like us". The "not like us" is sometimes romanticised and sometimes villified, but neither are reliable accounts.
I'm not saying it definitely didn't happen. As I said in the first reply: "While I've no doubt some lords got away with raping peasants, it was very illegal and the penalty was death." I'm saying it definitely wasn't a right or a custom. Not in England, anyway.
In case anyone is wondering, chastity belts are Victorian. They were made up as "evidence" of how much more civilised Victorian times were - look at the barbarousness of the past! The only earlier mention is a second-hand retelling of a rumour that some women in some places had taken to wearing armoured underwear while travelling between towns as protection against being raped if they were attacked by bandits. It might or might not have happened, but isn't the same thing as the later stories about chastity belts anyway.